Machine for covering paper boxes.



APPLICATION FILED AUG. 4, 1902.

Patented Feb. 16, 1909.

7 SHEETS-SHEET 1.

Di hmoaeo J. ASPENLEITER. MACHINE FOR COVERING PAPER BOXES.

APPLICATION FILED AUG. 4, 1902. I v

Patented Feb. 16, 1909.

7 SHEETS-SHEET 2.

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J. ASPBNLEITER. MACHINE FOR COVERING PAPER BOXES.

APPLICATION FILED AUG. 4, 1902.

Patented Feb. 16, 1909.

7 SHEETS-SHEET 3.

mm um IZZ/ Witnesses C .W

m 7 kwfl J. ASPENLEITER.

MACHINE FOR COVERING I APER BOXES. APPLICATION FILED AUG. 4, 1902.

Patented Feb. 16, 1909.

7 SHBETSSHBBT 4.

Kl l/ KI/l/ n /77 J. ASPEN'LEITER.

MACHINE FOR COVERING PAPER BOXES.

APPLICATION FILED AUG. 4, 1902.

Patented Feb. 16, 1909.

7 SHEETS-SHEET 5.

J. ASPBNLEITER.

MACHINE FOR COVERING PAPER BOXES.

APPLICATION FILED AUG. 4, 1902.

Patented Feb. 16, 1909.

'I SHEETSSHEET 6.

J. ASPENLEITER.

MACHINE FOR COVERING PAPER BOXES.

APPLICATION FILED AUG. 4 1902.

Patented Feb. 16, 1909.

7 SHEETSQ-SHEET 7.

after/mp 25 of Fig. 1, upon an enlarged scale.

45 shown in Fig. 20.

UNITED STATES PATENT OFFICE.

JOHN ASPENLEITER, OF CIR'CIN'NATI, OHIO, A SSIGNOR, BY DIRECT AND MESNE ASSIGN- MENTS, TO STOKES AND SMITH COMPANY, OF'PHILADELPHIA, PENNSYLVANIA, A COR- PORATION OF NEW JERSEY.

MACHINE FOR COVFRING PAPER BOXES.

Specification 01' Letters Patent.

fatented Feb. 16, 1909 Application filed August 4, 1902. Serial No. 118,231.

To all whom it may concern:

Be it known that 1, JOHN ASPENLEITER, a citizen of the United States of America, and resident of Cincinnati, county of Hamilton,

State of Ohio, have invented certain new and useful Improvements in Machines for Covering Paper Boxes, of which the following is a specification.

' The object of my invention is a machine for turning the paper covering around the edges of paper boxes, automatically- This object is attained by the means described in the specification, specifically pointed out in the claims and illustrated in the accompanying drawings, in which,

Figure l is a perspective view of a machine embodying my invention. Fig. 2 is a perspective view taken from the opposite side of the machine from that of Fig. '1. Fig. 3

i is a top plan view of the same taken upon line 33 of Fig. 2, upon an enlarged scale. Fig. 4 is a longitudinal vertical sectional view taken upon line .r-x of Fig. 3. Fig. 5 is a sectional plan view'taken upon line 55 Fig. 6 is a vertical sectional view taken upon line z2 of Fig. 5. Fig. 7 is a similar view taken upon line 0-42-01 Fig. 5. Fig. 8 is a similar view taken upon line 8-8 of Fig. 5. Fig. 9 is a similar view taken upon line t--t of Fig. 5.

Fig. 10 is a detail elevation of the mechanism for discharging the boxes from the machine after the operation is con'iplete.

- Fig. llis a vertical sectional view taken upon iine Ill--11 'of Fig. 10. Fig. 12 is a detaii central vertical sectional view of the re ciprocating-head taken upon line yy .of Fig. 13 upon an enlarged scale. Fig. 13 is a bottom plan view of the same. Figs. 1 1

e0 through 19 are detailviews showing the resnective st eps of-the operation. Fig. 20 is a vertical sectional view taken upon line u-u of. Fig. 5 upon a reduced scale. Fig. 21 is a detail view of' the bell crank mechanism Fig. 22 is, a detail perspec tive view taken upon line w-w of Fig. 4. i Fig. 23 is.a plan view of a modified form of the'reciprocating head. Fig. 24 is a detail vertical sectional view-of the same. Fig. 25

(Sheet 1) is a detail perspective view upon anenlarged scale of the catchfor detaining the block in its downward movement.

A description of the operation of the machine will be outlined now in brief,'.and

then a detail description will be given of the parts which carry out the successive steps.

Referring to Figs. 14 through 19, the box A upon which the'papcr covering is to be placed has had the paper strip a pasted around its sides, leaving the ends of the strip projecting above and below the box as shown in Fig. 14, before it is brought to my machine. The box is then placed upon the base plate B. The frames F then are brought ward to center the box beneath the head and then the retaining plate 0 of the reciprocating head 0 descends into the bottom of the box to hold it firmly upon the base/B. Then bars D are carried inward carrying the paper inward over the upper ed e of the box, as shown in Fig. 16. Then the head C descends into the box and carries the paper firml against the inner face of the box. Frame is then pressed farther inward against the sides of the box to press the paper f rmly against them. The base B then descends, the box then being supported upon stud H.

and brushes E carry the paper inward aroun the bottom edge of the box. The brush Eis then drawn downward away from the bot.- tom of the box, frame F is withdrawn from the sides, and base B is carried u ward as shown in Fig. 19 carrying the com eted box clear of the machine. these steps will now be described in detail. Table II is supported upon standards 71. and has upwardly projecting rods h, which support a top plate h which'support vertical ways if. Base plate B has two vertical rods 5 b which pass (lOWl'lWtLld through table H and have a red 1) connectin them at their lower' ends. Blate B has liiiewise a center perforation through which projects a short stud .H, which is supported by table H. 4

Rod If is connected by a link b to a leverb which is l'ulcrumed upon a fixed rod H which is supported b Y standards 72 Between rod H and link I) lover I) is connected by a link If to another lover I), which is pivoted upon a fixed rod is which is supported between standards k, themselves su ported by io'undation plate K. Beneath ever li is a cam I) mounted upon main shaft M. Cam b contacts lever b to raise it and. thereby raises the base plate 13 after the o eration oi'covering abox has been complete as shown in Fig. 19.

which are mounted in ways upon table ll.-

'ed upon the main shaft M.

Frames F for centering the boxes beneath the descending head C, are carried by slidesf The mechanism for drawing the slides inward to center the boxes is as follows: Centrally mounted u on table ii is a circular rotatable disk f w rich has pins fwhich engage slots cut -into inwardly pro ecting arms 7 of slide j. The rotation of the disk f actuates the. arms f to draw them in toward and away from the center of the table. Disk f is rotated by the following mechanism. T he disk has a hub pro ecting down through the table and secured to a horizontal arm 3. Army has aslot in its end which engages one arm of a bell crank lever f which is pivoted upon bracket f secured to the under side of the table H. The other end of the-bell crank lever is engaged by a rodf which is pivoted at its lower end to horizontal rod f which at its other end is pivoted upon a standard it secured upon foundation plate K. Rodf has a frame f in it (see Fig. 20) which engages a camf secured upon main shalt M. -'llie rotation of the shalt M imparts a vertical reciprocation to rod f 8 which is chan ed by bell crank lever f into a'rocking motion of the dislrf' which draws the frames F inward to 'center the box beneath the descending head C, upwardly projecting rods cuc which pass upward through ways hf and have upon their. upper ends a connecting bar c".

-Retainer plate 0 has a vertical rack rod 0 pro; ecting up through head'C and plate 7L2, the head C resting upon the retainer plate 0 and being car ried up and. down thereby. Rack rod 0 is engaged-by a pinion 0 carried by a lever c which is ivoted upon fixed arms 7& carried by plate i Lever c is engaged by a rod. 0

which at its lower end engages a bell crank Bell crank lever 0 1s lever c (see-Fig. 6). mounted upbn a horisontal shaft l mounted upon the foundation plate K and is pivoted to a horizontal red 0 which carries a box 0 which is engaged b y a cam c w hich is mount- The reciprocation of rod .0 rotates bell crank lever 3 and thereby imparts'a vertical reciprocating motion to the head C. a vertical rod 72 carried by the plate h Rod lr" carries a hook it which as the head descends enga es rod 0 and holds the head G stationary while retainer plate 0 is descending into the box, in the first step oi the operation; (See Fig-33.5).

Rack '0 has an upwardly prnjecting rod e which carries a roller 0 which after the box has been centered and the paper turned down over the edge by the bar D, strikes hoot; it" and carries it out of engagement with rod c allowing the weight oi the head C to carry it downward into the box to press the paper down as afore described. Just before head C thus descends the here D are carried HeadC has Adjacent to rods c" c is (1, which are mounted upon slides Blocks d have pivoted to their sides levers d which at their lower ends-engage pins (Z 11 on the frames d as shown in l 'i 4 and at t mix up- ;er ends have horizonta l pins d which r0- gcct outwardly in the at'hs of arms 0 w ich are carried by head and which strike the pins d' 'rotate the arm (Z andcarry the bars l) inward just before head (1 enters the box'. When released from arms a the bars D are returned to their normal position by springs al seemed to the fulcrumsfof the arm (F, as shown in Fig. .4. Blocks ,d have vertical perforations therein to pass'vertical rods j which are lined upon slides f. By means of set screws d blocks d may be adjusted at any desired height above slides f to accommodate the bars D to any height of box. Bars D are in horizontal planes. The bars at the end are situated immediately above the side bars and when the head 0 engages pin d, the

bars are carried in simultaneously over the upper edge of the box, whereby the corners oi the blank are foldedsrnoothly.

In the next step of the operation the base plate B descends, the box being then supported upon stud H, and thebrushcs E are carried inward to press the paper around the bottom edge of box A. The mechanism by which the brushes. are operated will be described first, for the reason that the-means which lowers base plate B are actuated by the brush mechanism. Brushes E are mounted upon one end of hell crank levers e which are journaled in brackets e projecting down from sliding bars e which are mounted upon the under side of the upper member f of each of the four slides f. Beneath each of the slides f ways are formed in the table H in which are mounted reciprocating bars e which project out beyond the sides of the table H and have vertical upon the other outer ends.

nected by a link e to the ends of bellcrank levers e. Sliding bars e fit their ways loosely and have flat springs e bearing down upon them, as shown in Fig. 22 so as.to render their sliding in the ways somewhat stifl so that whenthe link e is pushed inward the first action is to rotate thebel-l crank lever e upon its pivot upward so as to bring it on a level with the bottom of the box, the further osts e secured osts e are conrotation of the bell crank lever beingstopped by stud 6 coming in contact with the under side of the upper member f of slides f. 'A tartl'ierprcssure 1nward of rod e then causes bars 2' to slide in their ways carrying brushes l against'the bottom of the box and ressing the paper around the edge thereof. 1 backward pressure is exerted on rod e the first result is to-rotate bell crank lever e ena downward so that the brush in its return movement does not scrape paper away trom the box. The four brushes, that is, the

brushes for the ends and i'or the sides of the box are alike in construction thus far set forth. The mechamsm by which slides c are ri'api xrocatcd will now be described.

Slides 0' have studs 6 projecting down' through. ways in the bottom of the table, and these studs c are pivoted to bell crank levers e which ,are journaled in brackets which reject downward from bot-tom of tails II. The means by which the brushes are operated are the same for each set, that is, the sets which are at the end of the box, and the sets which are at the side. A description therefore will be given of only one set of the mechanism. Each of bell crank levers a of one set areconnected to rods e and c (see Fig. 9), which at their lower ends are connected by a rod e which is connected by a link 0"" to a lever c which is pivoted at its other end on shaft k Levere has a roller 0 which contacts a cam a mounted upon shaft M. The rotation of shaft )1 through cam c raises. lever e rocks bell crank lever e" and carries the sliding bar e inward. The bar a is returned to its normal position by a spring 0" (see Fig. 4).

The means by which base plate B is lowered just before the brushes are carried inward is as follows. Rod I) rests in its normal position upon a bell crank lover I) which is fulcrua'icd upon shaft 7; and has an arm I) which projects over the path of rod e (see Figs. 8 and 9). When rod e is raised to carry the brushes inward, rod contacts arm I) and throws the bell crank lever out from under in which then drops to allow the base plate 13 to fall to the table of its own weight, a position which it occupies until it raised ,to its uppermost position by the cam b to carry the box upward after it has been covered. Alter rod e has been again lowercd' bell crank lover 1) assumes its normal posiiion'of its own weight to retain base plate B in its normal position upon its return. The means by which additional pres.- sure is brought upon frames F to cause the paper to adhere more closely to the sides is simply this. When rod c is carried inward to carry brushes over the bottom of the box post e strikes slide f and causes it to be pushed inward somewhat thereby pressing fran'ics l iii-ml against the sides of the box.

The means by which the completed box is knocked ofi' of the base plate B in its raised position as shown in l ie'. 19. will now be'doscribcd. Upon a bracket mounted upon one of the rods i l is pivoted a rod 0 whichhas a rcarwardl r projecting arm 0 (see Figs. 10 and 11) which is en jaygged' normally by a spring stud o mounted in bracket 0. Stud 0 has a tapered face 0 Journalcd upon the same pivot with arm 0 IS a link 0*. Link 0 and the upper end of rod 0 are connected by a coiled spring 0" andlink o is c nnected by a rod. 0 with the end of rod b beyond stationary rod H Now then, when red. I is raised to carry the use plate B upward rod 0 is lowered thereby drawing link 0 downward bel tween arms 0 and the taper face 0 of the spring stud 0 thereby forcing arm 0 out of con actwith the stud, which event occurs iust as the base plate B reaches the upper limit of its travel. The spring 0 then throws arm 0 torwa rd with a jerk so that it hits the box and knocks it (ill of the base plate clear of the'machinc. Wlien the base plate again descends the knockcr is returned to its normal position by a spring 0 secured to link n at one end and to plate it" at the other. l. prefer to cover the sides 0 of the head (l with felt. Between retainer plate (1 and head l likewise place a coiled spring 0" whichcauses the retainer plate to hold the box to the base plate B with a \'lGl(lli1Q pressure.

In .lfiigs..23 and 24 l. have illust rated a inedi- 5 fie-d form of reciprocating head. ln this modificationbarsDareomitted. llcciprocati112 head R has four ways formed in it at llSIllt angles to each other in which. are four sliding arms r1" 1 r". Arms 1* fhave pivoted to them bell crank levers 7' 1' which are turned upon pivots 7- 1" in head it and the other ends of which are connected by links 1' 1" to slides 1" 1" so that when either set of arms are drawn inward toward center or outward therefrom the other arms perform a similar movement. Slides 1' 1" 1' are socured upon their outer ends to vertical plates 1 1' r 1'. To the ends of slides 1" r are scoured rollers 1' T which cont act blocks (1 to carry the plates 1' 1' inward. The inner faces of blocks (1" are tapered. Plates 1"" 1' respectively stand outside of the edges of the box when the slides r r are distended. As the head descends, the plates come outside of the edges of the paper strip A. hen

blocks d the plates are carried inward thereby turning the paper over the edges of the box and pressing the paper against them. The means by which the arms 7* 1" 1" 1' are distended is as follows: Arms 1" 1' are connected by togrp le lovers 1' which strike plate 7L2 when the hcad-has reacliicd the upper limit of its travel, which flatten out thereby and cause the plates r 1 to be carried apart likewise carrying; plates 1- r apart. In place ofusinp; brush in the brushes it], I may use felt.

which I have used it, but it is obvious that many more meclninical changes might be made in the construction shown without dcparting from the spirit or scope of my inveniion, and hence I do not wish to be limited to the specific means shown.

I What I claim is.

l 1. The combination of the rollers 1' contact thetaper face of the l. have shown the inventionin the form in l means tor supporting a box having paper covering pasted on its sides, brushes to be carried inward to ress the paper against the bottom of the ox, and means for drawing the brushes downward and backward after the operation. substantially as shown and described.

2. The combination of a base plate for supporting a box having the paper covering pasted to its sides, and projecting beyond its upper and lower edges, plates to be carried inward over theupper edge of the box to f turn the paper down, a head to descend and press the paper against the inner sides of the 1 box, brushes to be carried inward across the bottom of the box to carry the paper against downward and backward after operation and means for actuating the frames, the plates, and reciprocating head, substantially as shown and described.

4. The combination of a table for.sup-

porting a box of the character described, a

vertical reciprocating retainer plate, bars to be projected over the edges of the box, a head resting upon the retainer plate, means for checking the downward motion of the head while the plates are ,being carried over the edge of the box, means carried by the retainer plate for then releasing the head, means whereby the head engages the plates to carry them inward before it enters the box to turn the paper down and means for recip rocatingthe retainer plate-substantially as shown and described.

'5. The combination of a table, a sliding bar in ways in the table, a bell crank lever pivoted to the sliding bar, brushes carried by one arm of the bell crank lever,-means for creating a friction between the sliding bar and its ways a rod attached to the other arm of the bell crank lever, and means for carrying the bar inward, whereby the brushes are means for advancing said wiping devices in raised first and then carried inward and upon the return motion the brushes are lowered and then drawn back substantially as shown and described.

6. The combination of a table for supporting a box of the character "described plates mounted upon the table for being proa ver the edge of the boxto carry the jected paper inward, levers pivoted upon the table and engaging the plates at one of their ends, a vertical reciprocating retaining plate, a

I l I head resting upon the retainer plate, means for detaining the head in its descent while the retainer plate engages the box to hold it'in place, means carried by the retainer plate for then releasing the head, and arms carried by the head for engaging the levers andcarrying the plates inward before the head enters the box substantially as shown and described. 1 i

7. The combination of a table having radial ways therein, slides mounted in the Ways, a base plate upon the table for supporting a box having the paper covering pasted on its. sides, frames mounted upon the slides for centering the box, plates mounted upon the slides to be projected inward over the edge of' the box, a reciprocating head for entering the box to turn the paper down, and means carried by the head for engaging the plates and carrying them inward before the head enters the box substantially as shown and described.

8. The combination of a table, a base plate supported thereby, a stud passing through the base plate and fixed to the table, said stud constituting a support for a box, plates to be projected over upper edge of the box placed upon the base plate, brushes to be carried across bottom of the box, a reciproeating head for entering the box, means for actuating the head, and means for lowering the base plate below the upper end of the 'stud before brushes are carried inward substantially as shown and described.

9. The combination of means for supporting a box having covering material pasted-to. its sides and projecting below. the bottom Leo thereof, and means for pressing the said projecting portions of the covering material against the bottom of the box, comprising slidably mounted brushes located upon opposite sides of the said box supportingmeans, and means for advancing the said brushes in one plane and retracting them ina-nother plane. x

10. The combination with means for supporting a box having covering material pasted to its sides and projecting below the ottomthereof, .of means for pressing the.

said projecting portions of the covering material against-the bottom of the box, comprising vertically disposed wiping devices arranged upon opposite sides of the box supporting means below the plane'thereof, and

one plane and retracting them in another plane.

11. The coinbination'of a base plate for supporting a box of the character described, plates for being projected over the upper edge of the box for carrying the paper inward, a

reciprocating head for entering the box and turning the paper down, brushes to be carried across the bottom edge of the box, means for actuating the plates, the head and the. brushes, means for lowering the base plate before the brushes are carried inward, means for supporting the box elevated when the base plate is lowered, and means tor raising the base plate above the plane of the plates after the operation of the brushes substantially as shown and described.

12. The combination of a table havingi radial ways, a base plate for supporting a box, slides in the ways, centering frames car ried by slides, turning in barsmounted upon the slides, brush carriers pivoted to the slides a vertical reciprocating head, means for carrying slides inward to center the box, means for carrying the turning in bars inward over the edge of t he box, and means for carrying brushes inward substantiall as shown and described.

13. In a machine oi the class described, the combination with a table, oi a bar slidable in waysin the table, a bell crank lover pivoted to the sliding bar, a brush carried l one arm of the bell crank lover, a rod attached to the other arm of said lever, and means for actuating the bar, whereby the brush will first be raised, then moved inward, and finally lowered and drawn back, substantially as and for the purpose described.

14. In a machine of the class .:.lescribed, the combination with a base-plate for sup porting a box, having paperico-vering pasted to its sides, a table, blocks mounted upon the table and" adjustable vertically relatively to the baseplat-e, plates carried by the blocks to be projected inward over the upper edge of the box, a reciprocating head. to enter the box after the plates have been projected over the er'lgc, and means for actuating the plates and head.

17. The combination with means for supporting a box having covering material pasted to its sides and projecting below the bottom thereof, of means for pressing the said projecting portions of the covering material against the bottom of the box, comprising vertically dispose 4 brushes arranged upon opposite Sia'oS ol' the box supporting means, and means {or rulvancing and retracting said brushes in ili'crent planes respectively.

18. In a machine of the class described, the combination with a base plate for supporting a box having paper covering posted to its sides, oi means (or turning the upper e"gcs oi the'covering paper over the upper ed es of the box walls, a vertically reciprocating head for Forcing the turned over edges ol the paper down into the box, a yielding retainer arrangml to enter the box in advance oi the bead, means [or causing said retainer to enter the box, and means operated by the retainer actuating means for controlling the movement of the head.

1t) in a machine of the class described, the combination with a base plate for supporting a. box having paper covering pasted to its sides, ot means tor turning the projecting edges of the covering paper over the upper edges of the box walls, a vertically re-.; ciprccator v head arranged toenter the box to force-the said projecting ed es of the paper; thcreinto and means actuated by the descent oi the head for actuating the said turning-in lllii illlh'.

20. in a, machine of the class described, the combination with a base plate for supporting a box having paper covering pasted on its sides, of bars for turning the project- 1 ing edges of the paper over the upper edges 15. In a machine of the class described, the eomblnation of a base plate l'or support- 1 ing a box to be covered, said base plate having an opening theretln'ough, a stud in line with said opening, means for lowering the base plate below the upper end olthe stud,

means for pressing the lower projecting edges of the covering material against the bottom of the box when the base plate is lowered and means for raising the base plate above the plane ot the said pressing means alter the latter have acted.

16. in a machine of the class described, a base plate for supporting a box to be covered, slides for engaging the sides and endsol the box to center e same upon the base plate, means for tul ng the covering pape over the upper edgesot the box and down into the latter, means for causing the said slides to impart a pressure externally ol' the box walls after the turning-in means have acted and means for actuating the slides, consisting of a rotatable disk and mechanism for rotating" the disk of the box walls, a vertically reciprocatory head for forcing the said projecting edges of the paper down into the box, and means actuate-l by the head for operating the bars.

21. in a machine oi the class described, the combination with a base plate for supporting a box having paper covering pasted to its sides, bars for turning the projecting edges of the paper over the upper edges of the box, a vertically rceiprocatory head For forcing the said pri'ujecting edges of the paper down into the box, means actuated by the head during its descent lor thrusting the bars inward, and means [or rclrncting the bars.

:22. in a machine of the class described, the combination with a base plate for supporting a box having papercovering pasted to its sides, bars l or turning the projecting edges of the paper over the upper edges of the box walls, pivoted arms each having connection with one of said bars, a vertically reciprocatory head arranged i force the ipro ecting i-dges of the paper downward the b into the'box, and means on the head for engaging the said pivoted arms to actuate ars.

23. 'I1l a machine of the class described, the combination with a base plate for sup porting a box having paper covering pasted to its side, of bars for turning the projecting edges of the paper over the upper ed es of the box, a pivoted arm having a connection with each bar, a pin projecting from eaclr arm, a vertically reciprocatory head. arranged "to enter the box and force the projecting edges of the paperdown into the same and projections on the head for engaging the pins during the descent of the head, whereby to actuate the-bars.

24. In combination with means for supporting a. box having,- qovering material asted to its sides and projecting heiow the ottonifithereof, of means for pressing the said projecting portions of the covering material against the bottom of the box, comprising vertically disposed Wiping devicesfarranged upon opposite sides of he box supporting means below the plane thereof, means for advancing and retracting said Wiping devices in difierent planes respectively, and moansfor centering the box 'on its support relatively to the Wiping devices prior .to the operation thereof. 1

25. In combination with means for sup porting a box having covering materiai 1 asted to its sides with portions projecting eiow the bottom of the box, of means for pressing the said projecting portions of the covering material against the bottom of the box, comprising brushes to be carried across the bottom edges of the box, means for advancing and retracting the brushes in. differentplanes respectively, means for lowering the box supporting means before the brushes are advanced, and me'ansi'or supporting the box elevated when the supporting means is lowered.

26. in a machine of the character described, means for supporting a box having covering material pasted to its side walls and projecting above and below the upper and lower edges thereof, means for turning the upper projecting portions of the covering material over the upper edges of the box Walls and aiiixing the same to the-inte ior thereof, and means for pressing the said lower projecting portions of the COVE]?- ing material against the bottom. of the box, comprising slidably mounted brushes arranged upon opposite sides of the said box supporting means, and means for advanc ing and retracting the brushes in diflerent planes respectively.

JGHN ASPENLEITER.

itnesse W, MURRAY, A. Mowsnson 

